Abstract: Methods, computer-readable media, software, and apparatuses provide a system for implementing a tool that allows users to test a webpage. The system may include a computing device configured to use the tool to parse a request that is transmitted in response to, for example, a selection to load the webpage. The tool may also generate a user interface comprising variables of the request. The variables may be displayed so that they may be selected by a user. For each selected variable, the computing device may generate a column within a table. The table may include the values for each selected variable. The computing device may also generate a second table with corresponding values for corresponding variables. Further, the computing device may compare corresponding values to execute regression testing. Also, the computing device may allow a user to select criteria for certain variables to generate rules and apply rules against requests.